Deylaman District () is in Siahkal County, Gilan province, Iran. Its capital is the city of Deylaman.
At the time of the 2006 National Census, the district's population was 12,721 in 3,650 households. The following census in 2011 counted 11,178 people in 3,715 households. The 2016 census measured the population of the district as 10,597 inhabitants in 3,804 households.